001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.lang.resolve.java.kt;
018    
019    import com.intellij.psi.PsiAnnotation;
020    import com.intellij.psi.PsiClass;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
024    import org.jetbrains.jet.lang.resolve.java.resolver.JavaAnnotationResolver;
025    
026    public class JetClassAnnotation extends PsiAnnotationWithAbiVersion {
027        private static final JetClassAnnotation NULL_ANNOTATION = new JetClassAnnotation(null);
028        static {
029            NULL_ANNOTATION.checkInitialized();
030        }
031    
032        private String signature;
033    
034        private JetClassAnnotation(@Nullable PsiAnnotation psiAnnotation) {
035            super(psiAnnotation);
036        }
037    
038        @Override
039        protected void initialize() {
040            super.initialize();
041            signature = getStringAttribute(JvmStdlibNames.JET_CLASS_SIGNATURE, "");
042        }
043    
044        @NotNull
045        public String signature() {
046            checkInitialized();
047            return signature;
048        }
049    
050        public int kind() {
051            return flags() & JvmStdlibNames.FLAG_CLASS_KIND_MASK;
052        }
053    
054        @NotNull
055        public static JetClassAnnotation get(PsiClass psiClass) {
056            PsiAnnotation annotation = JavaAnnotationResolver.findOwnAnnotation(psiClass,
057                                                                                      JvmStdlibNames.JET_CLASS.getFqName().asString());
058            return annotation != null ? new JetClassAnnotation(annotation) : NULL_ANNOTATION;
059        }
060    }